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Question

Your friend is playing a song on a piano. Whenever your friend hits a certain key, the lamp on top of the piano rattles. Explain why the lamp rattles.
  1. The lamp rattles because of the occurring of interference
  2. The lamp rattles because of the occurring of diffraction
  3. None of the above
  4. The lamp rattles because of the occurring of resonance

A
The lamp rattles because of the occurring of diffraction
B
The lamp rattles because of the occurring of resonance
C
None of the above
D
The lamp rattles because of the occurring of interference
Solution
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This happens due to resonance (A phenomenon in which a vibrating system or external force drives another system to oscillate with a greater amplitude at a specific frequency). The lamp on top of the piano has a resonant frequency equal to one of the notes being played.

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